Building A Sundial

6 p.m.

6 a.m. 55

5. Tape here.

30 25

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2

1. Cut here.

1 12 11 2. Fold here.

Northern Hemisphere Sundial 1. Cut in from edge of paper along dotted lines. Stop at solid lines. 2. Fold along solid horizontal line with line on outside. Crease, then open flat again. 3. Fold along solid vertical lines with lines on outside. Crease, then open flat again. 4. Select the latitude line closest to your latitude. Fold with line outside, crease, and fold again with line on inside. 5. Tape the paper together as shown at right. 6. Insert a sharp pencil point-first through the small circle at top center. Remove pencil and reinsert it with the eraser first. 7. If needed for stability or durability, tape the whole thing to a sheet of cardboard. 8. Turn the sundial so the pencil points due north, as determined by a map or a compass. 9. If you can't find north, orient the sundial so that it agrees with your clock. (Subtract one hour from the clock time if you're on daylight-saving time.)

10

9

Fo lat ld a itu lon de g b lin es e. t

3

45 40 35 30 25

1. Cut here.

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5. Tape here.

35

4

50

4.

40

7 8

5 3. Fold here.

45

st be ng . alo ine ld e l Fo ud 4. latit

50

3. Fold here.

55